687822228787 has 2 divisors, whose sum is σ = 687822228788. Its totient is φ = 687822228786.

The previous prime is 687822228733. The next prime is 687822228811. The reversal of 687822228787 is 787822228786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687822228787 - 2⁷ = 687822228659 is a prime.

It is not a weakly prime, because it can be changed into another prime (687822228707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343911114393 + 343911114394.

It is an arithmetic number, because the mean of its divisors is an integer number (343911114394).

Almost surely, 2^687822228787 is an apocalyptic number.

687822228787 is a deficient number, since it is larger than the sum of its proper divisors (1).

687822228787 is an equidigital number, since it uses as much as digits as its factorization.

687822228787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134873088, while the sum is 67.

Subtracting 687822228787 from its reverse (787822228786), we obtain a palindrome (99999999999).

The spelling of 687822228787 in words is "six hundred eighty-seven billion, eight hundred twenty-two million, two hundred twenty-eight thousand, seven hundred eighty-seven".